Text-book of general physics, for the use of colleges and scientific schools (1899)
Hastings, Charles Sheldon · Boston: Ginn & company · leaf 508
ngs oftwo Leyden jars, D, F, areconnected to the terminalsA, B, of a Holtz machineor an induction coil, and theouter coatings to a wire inwhich a few turns are madeat O. If an exhausted bulbbe introduced into this coil,when sparks are made to pass between A and B the rapidoscillations which are set… … Earth Fig. 322. 498 PASSAGE OF ELECTRICITY THROUGH GASES. When the pressure of the air within the bulb is consider-able, no discharge can be obtained; but when it is reduced toabout 1 mm. of mercury, a thin thread of reddish light maybe observed within the plane of the coil. As the pressureis…
Physics
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